Physics
Waves Vibrations and Oscillations

# What is the equation for destructive interference?

234 ###### 2008-02-19 22:25:14

The last term in the total irradiance equation from optical physics is known as the "interference term". That interference term will indicate the total magnitude of interference and the sign will indicate whether the interference is destructive (-) or constructive (+). The total irradiance equation is: Itot = I1 + I2 + 2*SQRT(I1*I2)cos(A) where angle 'A' is the phase angle between the E-fields of the two interfering waves. If 'A' is greater than 90 degrees and less than or equal to 180 degrees, the interference is destructive. Note that if 'A' equals 90 degrees, there is zero interference. If 'A' is between 0 degrees and 90 degrees, the interference is constructive.

🦃
0
🤨
0
😮
0
😂
0

## Related Questions An example of a destructive interference is a wave.  Interference is constructive if the phase difference is zero degrees and destructive if the phase difference is 180 degrees. constructive interference destructive interference    Because, there is destructive interference that occurs there.  Constructive and destructive interference can occur at any frequency. Superposition of waves is not dependent on a specific frequency. No, "destructive" has nothing to do with "catastrophic"; it just means that two waves act in opposite directions. The conditions for constructive and destructive interference :the phase difference between the two waves which are interfering must be even multiples of 180 degrees phase and odd multiples of 180 degrees for constructive and destructive interference respectively. Constructive interference occurs when two waves interfere in phase with one another. Destructive interference occurs when two waves interfere out of phase by 180 degrees or PI radians.combinedwaveformwave 1wave 2Constructive interference Destructive interferenceConstructive interference occurs when the phase difference between the waves is a multiple of 2&pi;, whereas destructive interference occurs when the difference is &pi;, 3&pi;, 5&pi;, etc.Constructive interference occurs whenever two waves combine to make a wave with a larger amplitude.Destructive interference is when the amplitudes of two waves combine with each other producing a smaller amplitude. Destructive interference is where two sound waves mix and cancel each other out to some extent. If destructive interference is occurring, the sound level will be lower than you would otherwise expect. A properly designed auditorium will use both destructive and constructive interference where required to achieve the desired clarity of sound.  The terms "constructive" and "destructive", in relation to waves, refer to interference. There can be interference with any kind of waves. When the waves are in phase, you have constructive interference; when the waves are out of phase, you have destructive interference. Constructive interference can be a confusing concept when called interference. It is wave interference that is moving in phase with another wave. This causes the waves to for a resultant wave with a greater amplitude. Destructive interference is wave interference that is moving out of phase with another wave. These waves form a resultant wave of lower amplitude.  Destructive interference occurs when 2 (sound) waves reach the same point, out of phase. In order to find it, you subtract the smaller distance from the larger distance. because of destructive interference ,destructive interference is when one crest i.e. high point and trough i.e. low point is there.  Destructive interference occurs when the amplitudes of two waves combine to produce a wave with a smaller amplitude. constructive interference.. when the crusts or troughs of two waves overlaps they form one wave of greater amplitude. destructive interference. when the crust of one wave overlaps with the trough of another wave they reduces the effect of each other Constructive interferences and Destructive interferences.

###### PhysicsScienceWaves Vibrations and OscillationsMechanicsMusicNuclear PhysicsAstronomy Copyright © 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.